StubStrategy (JBoss IIOP Plugin API) - JBoss 3.2.7 iiop API Documentation 英文版文档

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org.jboss.iiop.rmi.marshal.strategy
Class StubStrategy

java.lang.Object
  org.jboss.iiop.rmi.marshal.strategy.StubStrategy

public class StubStrategy
extends Object

An StubStrategy for a given method knows how to marshal the sequence of method parameters into a CDR output stream, how to unmarshal from a CDR input stream the return value of the method, and how to unmarshal from a CDR input stream an application exception thrown by the method.

Version:: $Revision: 1.1.2.3 $
Author:: Francisco Reverbel

Method Summary

Object convertLocalRetval(Object obj)
          Converts the return value of a local invocation into the expected type.

static StubStrategy forMethod(String[] paramTypes, String[] excepIds, String[] excepTypes, String retvalType, ClassLoader cl)
          Returns an StubStrategy for a method, given descriptions of the method parameters, exceptions, and return value.

boolean isDeclaredException(Throwable t)
          Checks if a given Throwable instance corresponds to an exception declared by this StubStrategy's method.

boolean isNonVoid()
          Returns true if this StubStrategy's method is non void.

Exception readException(String id, InputStream in)
          Unmarshals from an input stream an exception thrown by the method.

Object readRetval(InputStream in)
          Unmarshals from an input stream the return value of the method.

void writeParams(OutputStream out, Object[] params)
          Marshals the sequence of method parameters into an output stream.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

forMethod

public static StubStrategy forMethod(String[] paramTypes,
                                     String[] excepIds,
                                     String[] excepTypes,
                                     String retvalType,
                                     ClassLoader cl)

Returns an StubStrategy for a method, given descriptions of the method parameters, exceptions, and return value. Parameter and return value descriptions are "marshaller abbreviated names".

Parameters:: paramTypes - a string array with marshaller abbreviated names for the method parameters; excepIds - a string array with the CORBA repository ids of the exceptions thrown by the method; excepTypes - a string array with the Java class names of the exceptions thrown by the method; retvalType - marshaller abbreaviated name for the return value of the method; cl - a ClassLoader to load value classes (if null, the current thread's context class loader will be used)
Returns:: an StubStrategy for the operation with the parameters, exceptions, and return value specified.
See Also:: org.jboss.iiop.marshal.CDRStream#abbrevFor(Class clz)

writeParams

public void writeParams(OutputStream out,
                        Object[] params)

Marshals the sequence of method parameters into an output stream.

Parameters:: out - a CDR output stream; params - an object array with the parameters.

isNonVoid

public boolean isNonVoid()

Returns true if this StubStrategy's method is non void.

readRetval

public Object readRetval(InputStream in)

Unmarshals from an input stream the return value of the method.

Parameters:: in - a CDR input stream
Returns:: a value unmarshaled from the stream.

readException

public Exception readException(String id,
                               InputStream in)

Unmarshals from an input stream an exception thrown by the method.

Parameters:: id - the repository id of the exception to unmarshal; in - a CDR input stream
Returns:: an exception unmarshaled from the stream.

isDeclaredException

public boolean isDeclaredException(Throwable t)

Checks if a given Throwable instance corresponds to an exception declared by this StubStrategy's method.

Parameters:: t - an exception class
Returns:: true if t is an instance of any of the exceptions declared by this StubStrategy's method, false otherwise.

convertLocalRetval

public Object convertLocalRetval(Object obj)

Converts the return value of a local invocation into the expected type. A conversion is needed if the return value is a remote interface (in this case PortableRemoteObject.narrow() must be called).

Parameters:: obj - the return value to be converted
Returns:: the converted value.